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Principal Engineer Silicon Photonics

Lumilens· Engineering
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San JoseFull-timePosted 2mo ago

About the role

Principal Engineer, Silicon Photonics leading product direction, requirements translation, and cross-functional execution for packaged silicon photonics and optical interconnects.

Responsibilities

  • Lead Product Definition: Own and drive product requirements for next-generation optical interconnects, balancing performance, manufacturability, cost, power, and time-to-market.
  • Be the Customer and Product Voice: Serve as the primary technical interface with customers, foundry partners, and suppliers, ensuring product decisions are grounded in real-world use cases, market needs, and execution realities.
  • Drive Cross-Functional Alignment: Create and own clear product requirements, aligning internal engineering teams, external partners, and key stakeholders around priorities, trade-offs, milestones, and deliverables for packaged optics solutions.
  • Analyze and Optimize: Perform critical link analysis, using simulation and modeling to assess impairments like noise and distortion, ensuring our products deliver robust performance in real-world systems.
  • Translate System Goals into Execution: Convert top-level product objectives into actionable requirements for silicon photonics, electronics, firmware, software, validation, and manufacturing partners.
  • Lead Packaged Optics Execution: Guide the development of packaged silicon photonics solutions, including co-packaged optics and optical I/O approaches, with attention to assembly tolerances, fiber attach, thermal constraints, test strategy, reliability, and scale-up readiness.
  • Validate: Define the complete testing strategy, from engineering verification and product validation to system integration. You will define test methodologies, select equipment, and be hands-on in the lab to bring our products to life.

Qualifications

  • Proven experience in a principal-level technical leadership role developing and delivering photonics-based products.
  • Deep expertise in silicon photonics design, performance characteristics, and trade-offs.
  • Direct experience with packaged silicon photonics or optical engine development, including packaging trade-offs, integration constraints, and manufacturing considerations.
  • Demonstrated ability to perform optical link budget analysis using simulation and modeling.
  • Experience defining product requirements and driving execution across hardware, firmware, software, validation, and manufacturing teams.
  • Experience defining test plans (EVT, DVT, SVT) and test methodologies for optical systems.
  • Ability to work effectively and drive decisions within a fast-paced, startup environment.
  • Must be hands-on in a lab environment.

Skills

Required:Silicon photonics designPackaged optics / optical engine developmentOptical link budget analysisProduct requirements definitionTest planning and methodologies (EVT/DVT/SVT)Lab hands-on
Nice to have:Python scripting

Benefits

  • Competitive salary commensurate with experience
  • Comprehensive benefits package including health insurance
  • Professional development opportunities and certification support
  • Access to cutting-edge technology and cloud platforms
  • Collaborative work environment with cross-functional teams
Last updated Aug 15, 2026. Interested? Apply on the company site.

About Lumilens

Connectivity Platform for AI

Lumilens provides next-gen photonic interconnects for massively scaling out – and scaling up – AI compute infrastructure.

Photonic InterconnectsNext-Gen ManufacturingSystem-level knowledgeLumicore platformCPO/SiPh manufacturing
Company profileWebsite

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